US4113499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension for making molds in disposable pattern casting
Assignee: Individual
•
Filing: 1976-03-18
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Granted: 1978-09-12
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Expires: 1996-03-18
Abstract
Abstract A suspension for making molds, containing a binder which comprises alkyl silicate, water and hydrochloric acid, a refractory filler which has a grain size mainly of not more than 50 mu, and a surfactant featuring a wetting and plasticizing effect. Moreover, the composition of said suspension incorporates a phosphate. The weight percentage of said components in the suspension is as follows: Alkyl silicate -- 2.5 -- 9.0 Water -- 16.5 -- 23.0 Hydrochloric acid -- 0.05 -- 0.25 Phosphate -- 0.2 -- 1.0 Surfactant -- 0.02 -- 0.10 Refractory filler -- the balance.
Inventors
- 👤 Valentin Nikolaevich Ivanov
- 👤 Anna Davydovna Chulkova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:28
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/205
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
In a suspension suitable for making molds useful in disposable pattern casting, consisting essentially of from 2.5 to 9.0 percent by weight of a C 2 -C 4 alkyl silicate, from 16.5 to 23.0 percent by weight of water, from 0.05 to 0.25 percent by weight of hydrochloric acid, from 0.02 to 0.10 percent by weight of a surfactant selected from the group consisting of alkyl sulfates, alkyl-aryl sulfonates, salts of sulfosuccinic acid esters, sodium salts of condensation products of fatty acid chlorides with methyl taurine, oxy-ethylated alkyl phenols and aliphatic alcohols, glycidol derivatives of alkyl phenol and sulfonated oxy-ethylated compounds, the balance being refractory filler having a grain size of not more than 50 mu; the improvement comprising from 0.2 to 1.0 percent by weight of a phosphate selected from the group consisting of diphosphates of copper, magnesium, calcium, zinc, aluminum, titanium, chromium, manganese, iron, nickel, cobalt, zirconium and barium, alumochromophosphate and their mixtures.
Claim 2
Dependent Claim
155 words
In a suspension suitable for making molds useful in disposable pattern casting, consisting essentially of from 2.5 to 9.0 percent by weight of a C 2 -C 4 alkyl silicate, from 16.5 to 23.0 percent by weight of water, from 0.05 to 0.25 percent by weight of hydrochloric acid, from 0.02 to 0.10 percent by weight of a surfactant selected from the group consisting of alkyl sulfates, alkyl-aryl sulfonates, salts of sulfosuccinic acid esters, sodium salts of condensation products of fatty acid chlorides with methyl taurine, oxy-ethylated alkyl phenols and aliphatic alcohols, glycidol derivatives of alkyl phenol and sulfonated oxy-ethylated compounds, the balance being refractory filler having a grain size of not more than 50 mu; the improvement comprising from 0.2 to 1.0 percent by weight of a phosphate selected from the group consisting of diphosphates of copper, magnesium, calcium, zinc, aluminum, titanium, chromium, manganese, iron, nickel, cobalt, zirconium and barium, alumochromophosphate and their mixtures.
Claim 3
Dependent Claim
40 words
A suspension of claim 1, comprising the following components, the weight percentage of said components being: ethyl silicate -- 8.0 water -- 17.5 hydrochloric acid -- 0.15 copper diphosphate -- 0.9 alkyl-aryl sulfonate -- 0.08 pulverized quartz -- the balance.
Claim 4
Dependent Claim
40 words
A suspension of claim 1, comprising the following components the weight percentage of said components being: ethyl silicate -- 8.0 water -- 17.5 hydrochloric acid -- 0.15 iron diphosphate -- 0.6 alkyl-aryl sulfonate -- 0.08 pulverized quartz -- the balance.
Claim 5
Dependent Claim
48 words
A suspension of claim 1, comprising the following components, the weight percentage of said components being: ethyl silicate -- 8.0 water -- 17.5 hydrochloric acid -- 0.15 diphosphate of chromium and aluminium -- 0.8 surfactant - alkyl-aryl sulfonate -- 0.08 refractory filler - pulverized quartz -- the balance.
Claim 6
Dependent Claim
41 words
A suspension of claim 1, comprising the following components: ethyl silicate -- 3.2 l water -- 14.9 l hydrochloric acid -- 355 ml alumochromophosphate -- 415 ml disodium salts of sulfosuccinic acid -- 100 gms pulverized crystalline quartz -- 44 gms.
Claim 7
Dependent Claim
12 words
A suspension of claim 1, wherein the alkyl silicate is ethyl silicate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |